Housing and support for pilot lights



Jan. 11, 1944.

C. F. ROBBINS HOUSING AND SUPPORT FOR PILOT LIGHTS Filed Sept. 2, 1942 2 Sheets-Sheet l Big. Z

Jan- 11 1944- c. F. RoBBlNs HOUSING' AND SUPPORT FOR PILOT LIGHTS Filed Sept. 2, 1942 2 Sheets-Sheet 2 Patented Jan. l1, 1944 'UNITED'. s'rlvrss P rrEN'r OFFICE HOUSING AND SUPPORT FOR PILOT LIGHT 'cuco r. asthma," Cutler-Hammer poration of Delaware Appuoauon somminiz, maserm No. 457,091

1e' calm. (o1. 1x1-sea)- This invention relates to improvements in housings and supports for pilot lilhts.

An object ofthe invention is to vprovides. pilot light device which is interchangeable (with respect to mounting) with any one of a number of known forms of manually operable switchingdevices in a push button station or the like. L i

Another object is to provide a pilot light device 'employing a plurality of elementsvwhichv are standard with respect -to switches of the afore-A mentioned character, whereby mass production of the common elements is made possible. y

Another object is to provide a so-called heavy duty pilot light device of extremely simple, rugged and durable construction.

' to that or 113.1.

Fig. 2 is a similar view, taken at -a right angle Fig. 3 is a vertical sectional 3--3 of Fig. 2.

4 4 or mg. 1, the lamp bulb being omitted. l

Fig. 5 is a transverse section, on the'line4 5-1-5 of Fig. 1, with the lamp bulb removed.

Another object is to provide simple means enabling use of the pilot light device either with or without one or more resistor elements, according to the voltage of the circuit or circuits with which it is associated.

Another object is to provide a novel form of substantially unbreakable lens for use with the pilot light. said lens having means formedv integrally therewith to provide for directbut removable attachment thereof to a suitable support.

Another object is to provide a novel `forni' of one-piece molded insulating base for a pilot light v Another object is to provide novel and exe4 tremely simple forms of center and screw thread `ontacts for proper support of the pilot lamp.

Another object is to provide novel and simple.

means for rendering such a pilot light device subj stanti ally liquid-tight.

. of a pair of like securing screws, which I have Another object is to provide novel means locatedinteriorly of the supporting'panel or cover member to afford adequate ventilation of the lamp bulb.

Another object is to provide a novel form of. bushing to adapt the device for one-hole mount- Other objects and advantages of the invention will hereinafter appear.

The accompanying drawings illustrate certain embodiments of the invention which will now be described, it being understood that the embodiments illustrated are susceptible of modification in respect of certain structural details lthereof without departing from the scope of the appended claims.

In the drawings,

Figure 1 isa side elevational view of a so-called heavy duty pilot light device -of the one-hole mounting, liquid-tight type,.the supporting panel or cover member, to which the device is removably attached, being shown in dotted lines, anda pair 'of resistors being tl'llilltlyed. A l

Fig; 6 is a view, partly inside elevation 'and partly in vertical section, of the pilot light device when base mounted, the parts being arranged to provide for attachment of a single resistor.

Fig. 7 is a bottom plan view of the device shown in Fig. 6. 1

Fig. 8` is a fragmentary view. partly in vertical section and partly in side elevation, showing the adaptability of the pilot light device to flush-plate mounting; and

Fig. 9 is a view substantially like that of Fig. 4, but showing one possible arrangement of the lamp socket contacts and .their associated terminals with respect to the insulating base when no resistor is required. Y

Referring ilrstto the heavy duty pilot light device shown in Figs. 1 to 5, the numeral I 0 designates the onefpiece base which is preferably hot molded from any suitable insulating material, such as Bakeliteff Base Ill is provided at its upper end 'with a portion I0* of rectangular oontour, portion l0* being provided with an upwardly opening substantially rectangular recess I0 (Figs.

Sand 4); Recess Il l? is provided with a at bot- 4 l tom wall III. At diagonally opposite corners said 5 bottomKA wall i0 is provided with openings or passages (not shown) to accommodate the shanks designated .by the numerals Il and I2 (Fig. 4).

At the other diagonally opposite corners ofbottom wall I |l a pair of integral nlletsare provided, said fillets having fiat upper surfaces lil*i and llie of triangular contour offset upwardly from said bottomwall. Inasmuch as' recess I0 is not of vsquare contour I prefer to provide at the corresponding side of each triangular surface Illl and I0 an integral lvertical shoulder Inllt and |02, respectively.

.As shown in Fig. 4, the D111'D0se of shoulders i0* and lill is to insure proper positioning within recess Illb of a symmetrically formed punched and stamped sheet metal member I3, upon seating of 'either surface of the triangular end portion l3 thereof upon either of the ledges or surfaces Id or l0. Each ledge Nd and l0* is provided with an opening or passage (not shown) to vaccommodate the Shanks of like securing screws I4 and l5, which are preferably substantially longer Vthan the aforementioned screws Ii shown matig.' 4, screw u is emp1ovedto view, on the line. Y

secure member'l3 in position. The main body portion of member I 3 is preferably of rectangular contour, as illustrated; the same having a circular opening I3h formed therein which is adapted to be concentrically positioned with respect to a relatively larger circular opening |l1 (Figs. 3 and 4) formed in the bottom wall |0 of said recess. Member I3 is preferably provided with a slot |3 which extends from the free end there- -of to opening IIb, thus providing `a pair of arms I 84 and |3, the arm I3d being bent downwardly at a predetermined angle (from a lineV adjacent the inner edge of vopening Ib) and the arm I 3 v being bent upwardly at a corresponding angle from said line. -The peripheral edge of opening I3 is thus arranged in the form of a spiral or thread of predetermined pitch, whereby\the same is adapted to accommodate the screw shell contact I6l of an electric lamp I8 of suitable Isize and capacity. In practice I prefer to employ a miniature lamp having a rating of 6 watts at 120 volts,v although lamps of other capacities may, of course, be employed. i

Two resistors I1 and I8, of like or different' values, are employed in the device of Figs. 1 to 5, and I provide for attachment and support thereof by means associated with the pairs of screws I4, I2 and II, Il (Fig. 4). Thus the screw I4 is adapted to take into a tapped opening in a flat plate I8 (Figs. 1 and 5) which acts as a nut therewhich end acts to clamp the looped end of a wire 2l inA position, the other end of which wire is attached to the terminal lbof resistor I 8 (Fig. 2).

As'shown the base I0 has perforated lateral projections I Il1 and I 01 formed integrally therewith. Said projections I0l and I0j are preferably of the'same shape and size as the projections 35* and 80h of base 3l in Fig. 5, for instance, of said application, Serial No. 449,756, and perform a like function. Thus, as shown in Fig. 3 hereof, projections I0l and |01 are respectively provided with openings or passages to accommodate the shanks of a pair of bolts 26, 28 which act to -secure4 base I0 andits associated parts to an adapter member 21, which is preferably a metal die casting. Member 21 may be, and preferably is, identical with the adapter member shown at 00 in Fig. 15 of said application, Serial No. 449,-

' 756. Thus,l member 21 is provided with a relatively large circular opening, at least a portion l of which is threaded to accommodate the exterfor. Plate I9 also acts as a clamp for the looped end of a wire 20, whose other end is welded, brazed or otherwise electrically and mechanically connected to the terminal I1* of resistor I1. Wire 20 may be oi' relatively heavy single strand type, or, if of the multiple strand type, it is desirable to make the same suillciently sti to support one end of resistor I1 in a given position, regardless of the angle of mounting of the complete device.

The pilot light device hereincontemplated is particularly adapted for association with switches of the character disclosed in my copending application, Serial No. 449,756, illed July 4, 1942. Accordingly, to minimize the number of different parts required to produce both the switches and the pilot lights, I prefer that the lplate I8 shall be in the form of the 4square plates 58 shown in Fig. 26, for instance, of said application, Serial Nof449,756, the contact tips 02 of said plates 58,

. of course, not being required for use in this pilot light device.

Similarly the screw. I2 takes into the tapped opening (see Figs. 1 and 5) of a terminal plate 2 I, whose inner end acts as a clamp for the looped end of a wire 22; the other end of which wire is attached to the terminal I1b of resistor I1. Wires 20 and 22 thus act to support and position resistor I'I in the manner best illustrated in Figs. 1 and 5. The outer end 2|* of terminal plate 2| is tapped to accommodate the shank of a binding screw 23 to provide `for attachment of a circuit wire, it being noted that screw 23 is accessible exteriorly of the main body of base rI0 (see Fig. 4). I n practice the terminal plate 2| corresponds exactly with one or the other of the terminal plates 38 and I0 in Fig. 11 of said application. Serial No. 449,756, but with the contact tip 02 omitted.

Similarly the screw takes into the tapped opening in a plate I9 (Fig. 5) which -actsas a clamp for the center contact member 33 and the looped end of a terminal and supporting wire 24, whose other end is attached to the terminal |8 of resistor I8 (Fig. 4). Screw I5 takes into a tapped opening in one end of a terminal plate 2 I,

nally threaded lower end portion of a hollow metal bushing 28, the relatively larger head portion of which is designated by numeral 28. Said head 28! thus provides a shoulder 28b which is adapted to clampingly engage the upper surface of a panel or cover member 28, which is provided with anopening to 'accommodate said threaded lower end 28 of the bushing.

If the pilot light device is to be rendered sub'- stantially liquid-tight (or oil-tight) I prefer to interpose between the upper endV of adapter 21 vand the inner surface of panel 29 a gasket 30 of a shape corresponding to the contour of the upper surface of said adapter, said gasket preferably being punched from a sheet of neoprene," or a similar synthetic rubber-like material which is highly resistant to penetration therethrough of, or deterioration thereof, by, oil or grease. A perforated plate 3| is preferably interposed between shoulder 28h and the outer surface of panel 28, said plate having any desired legend engraved, embossed, printed or otherwise applied to the exposed surface portion 3|b (Fig. 2) thereof. Plate 3| is provided with a downwardly bent lug which penetrates gasket 30 and panel 29 and engages the walls of one of the four recesses in the upper surface of adapter 21. It is obvious from the foregoing that any oil or grease which may penetrate the opening in panel 29 is prevented by gasket 30 from passage to the exterior of adapter 21 or to the exteriorof base I0. 'I'he threaded connection between bushing 28 and adapter 21 effectively prevents passage of oil or grease into the interior of the device.

When the device is attached to panel 29 by bushing 28, the lamp I8 may be inserted, or removed for replacement thereof, through the relatively large internally threaded upper end or head portion 28'l of the bushing, either manually or by use of a suitable frictional gripping member (not shown).

As will be apparent from consideration of Fig. 3, the thread 28 in the head portion 28 of the bushing is of the same diameter as the thread in adapter 21, and the same is adapted to accommodate the externally threaded shank 32* (Fig. 3) of a molded, hollow lens member 32. Member 32 preferably consists of a synthetic thermoplastic material which is ini'rangible, or substantially unbreakable, and which is transparent, or at least highly translucent. For example, a thermoplastic material sold commercially under the trade name of Lucite is well adapted for this purpose. The dome or 'light-emitting portion of member 32 is assenso specially designed or shapedas illustrated to insure a large degree of visibility of the same when viewed from any angie upon illumination of the lamp bulb. A perlpherai'portion of member 32 is preferably milled exteriorlyas shown at 32 to ment is to provide for base mounting of the pilotlight device, if desired, as shown hereinafter in Fig. 6.v Additionally, however, said projections serve as proper barriers or spacers between the resistors i1 and Il when employed, as shown in Figs. l and 2. a

Also as shown in Figs.- 1 and 3, projections |31 and Il! are integrally connected byv a strut or reinforcement Ilk, of the thickness indicated bythe upward extensions of said strut shown atl I6" and l0" in Figs. l, 3 and 5, and of the length shown in Fig. 3. The mid-portion of strut Il* .is enlarged to approximately .cylindrical contour, as indicated at I3n inFlg. l, said enlargement having an opening or passage of circular cross section extending therethrough, as shown at |6 in Fig, 3. As best illustrated in Figs. i, 2 and 3 relatively largespaces or openings are provided between base Il and adapter 21, and in base AIl below and around the lamp bulb I3, so that adequate ventilation for the latter is provided at the rear of panel 23. notwithstanding the aforedescribed liquid-tight connection between the device as a unit and said panel. The passage I3 is adapted to accommodate and position the lower end of a brass or other suitable metal stud (not shown),

an intermediate threaded portion of which is clamped by opposed nuts to a specially perforated The resistors employed in a pilot light device I of the character herein contemplated may vary from 400 ohms (with a normal wattage of 10) to 6060 ohms (with a normal wattage of 20)', The two-resistor arrrangement is usually employed in conjunction with controlled circuits of 440 or 550 volts. -Where the pilot light is used in conjunction with a V110 or 220 volt circuit, only one resistor of suitable value may be employed; whereasin relatively low voltage circuits it is possible to entirely omit the resistors. y'I'he base I0 is especially adapted to provide for use thereof without change under all of the'conditions just mentioned. i

. The device of Figs.- 6- and 'I differs from that of Figs. l to 5 primarily in respect ofadaptability thereof forv base mounting (thus avoiding the necessity for bushing 23); the device of Figs. 6 and 7 also illustrating, by way of. example. the use of only one resistor. Thoseparts ofthe device of Figs. 6 and 7 which'correspond with parts of the device of Figs. 1' to 5 have been'designated byv like numerals of reference. VAs lbest illustrated in Fig. 6,.the shanks ofscrews I4 and I2 each take into tapped openings in metal plates i3., which respectively clamp the looped ends of wires 20.

and 22 associated with the terminals I1* and l1* of a resistor such as I1', it being understood that the head of screw il is adapted-to clampV in position the screw-thread contact. I3 of the socket, in the manner best illustrated in Fig. .4. -Also, as

shown in Fig. 7, the shanks of screws Il and Il respectively take into tapped openings in a pair of terminal platesv 2|, the center contact member 33 being clamped in position by the left-hand Vterminal plate 2| in Fig. 7.

In order to provide a circuit in series throughv lamp Il and resistor I1, a multiple-strand wire or bus member 34 has itsV respective ends welded, brazed, solderedA or otherwise electrically connected to the right-hand plate I8 and the right' hand terminalfplate 2| (Fig. 7). In practicewire '34 is connected to said parts I3 and-2l prior to attachment thereof to base I0, said sub-assembly of elements being like that shown in Fig.A 27 of said application, Serial No. 449,756, but with the contact tips 42 omitted.

Base |0,.with all of its parts assembled, may be attached (base moimted) to the inner panel shown in dotted lines at 3l in Fig. 6, as by means of a pair of bolts 33, 36 the threaded shanks of 7 the adapter 21 as shown in Fig. 3 the passages which communicate -vvithrecessesA 21e and 21b are threaded forcooperationwith the yshanks of bolts 26,26, in the adapter of Fig. 6 such passages are made sufficiently large to' provide slidv ing clearance for the shanks of bolts. 36, 35, for

an obvious purpose.

As shown in Fig. 6 the outer panel or cover member shown in dotted lines at 31 is provided with a circular opening 31'A to rather closely fit about the annular extension 21 on adapter 21,

whereby panel 31 is adapted to seat against'the substantially annular upper surface of said adapter. Annular sheet metal ring- 38 may be attached to the outer surface ofpanel 31 as by means of a pair of drive screws 39, 39,.who'se shanks penetrate suitable clearance openings formed in ring 33 and act to form threads upon fthe walls of drilled openings` of suitable size formed in said panel 31. Ring'38 may have any suitable legend or indicia printed or otherwise applied to its outer or exposed surface. vAs will be noted, in the device of Fig. 6 the lens 32 is adapted to be threadedly attached directlyto the internally threaded upper end of thepassage plate Iii is attached tothe upper surface ofllush plate 33,' as by means of drive screws Il, 4|, which penetrate suitable clearanceopenings in plate 40 and are adapted for formation of cooperating threads upon the wallsV olfv drilled recesses shown at 33 and 39d. Y Y

Flush plate 39 is provided with a flat peripheral flange portion 33?, between which and a panel gular contour from a sheet of synthetic rubber.. like material, such as "neoprene" The peripheral flange 33 is preferably provided along each` of the four sides thereof with a plurality of openings which register with corresponding openings in gasket 43, and with tapped openings in panel 42 which cooperate with the shanks of securing screws, two of which are shown at 44, 44 in Fig. 8. As will be apparent, the lens 32 coacts with the threaded opening or passage through ush plaie 33 to provide an oil-tight connection between said parts, whereas gasket 43 coacts with flush plate 33 and panel 42 to provide an oiltight connection therebetween'.

In Fig. 9 I have shown base Ill with the center contact member I 3 attached thereto through the medium of screw I I and a terminal plate 2|, with a tappedopening in which the shank of screw I I is adapted to engage. Similarly the head of screw I4 is adapted to clamp the screw-thread contact member I3 in the position illustrated, the shank of screw I4 .taking into a tapped opening in a terminal plate 2| .at the right-hand side of base Ill. The arrangement illustrated provides a circuit through the pilot lamp (I6 in the other figures) when no resistor (such as II or I3, or both) isrequired. In the particular arrangement illustrated the binding screws 23, 23 are accessible at the points illustrated. It is obvious, however, that if desired the groups of'elements II, 33 and 2l and I4, I3, and 2| may be transposed to diagonally opposite points, with respect to those illustrated, or either group only may be so transposed. Any desired arrangement of the pair of binding screws 23, 23 may thus be pro.- vided (to facilitate wiring in a particular installation), without in anywise affecting the electrical characteristics of the complete device. As will be understood the base III with its associated parts in Fig. 9 may be associated with other elements to provide for either one-hole mounting, base mounting, or iiush plate mounting, as disclosed in the various other figures oi' the drawings.

Also, with reference to Fig. 7, it is to be understood that an equivalent result may be obtained by substituting for the right-hand plate shown in dotted lines at is a terminal vplate 2|, thus obviating the necessity for use of said plate I9 and the wire or bus member 34, the disadvantage (from a wiring viewpoint) of having the binding screws 23, 23 located at diagonally opposite corners of base III being relativelyslight. Various other modifications and rearrangements of the parts of the devices will at once suggest themselves to those skilled in the art.

of said recess having a relatively smaller substantially circular opening formed therein, said opening providing` downward clearance for the center and screw shell contacts of a lamp, a fiat, punched sheet metal center socket contact member secured to said base and underlying the bottom wall of said recess and having a free end assenso portion thereof alined with said opening, a secsaid recess in upwardly offset relation to the bottom wall of the latter, said second contact member having a portion thereof alined with said opening and formed to accommodate the screw shell contact of a lamp, and a pair -of terminal members secured to and also underlying the bottom wall of said recess and having portions thereof projecting a substantial distance laterally beyond and at right angles to the respective side walls of said recess to facilitate wiring of the device, each of said terminal members being electrically connected with one of said contact members.

2. In a pilot light device, in combination, a one-piece molded insulating base having a relatively large substantially rectangular recess opening to the upper surface thereof, the bottom wall of said recess having a relatively smaller substantially circular opening formed therein. said opening providing downward clearance for the center and screw shell contacts 0f a lamp.

a nat, punched sheet metal center socket contact member secured to said base and underlying the bottom wall of said recess and having a free end portion thereof alined with said opening, a second punched sheet metal contact member` insertable downwardly into and positioned within said recess in upwardly onset relation to the bottom wall of the latter, said second contact member having a portion thereof alined with said opening and formed to accommodate the screw shell contact of a lamp, a pair of terminal members secured to and also underlying the bottom wall of said recess and having portions thereof projecting a substantial distance laterally beyond and at right angles to the respective side walls of said recess to facilitate wiring of the device, each of said terminal members being electrically connected with one of said contact members, a die-cast metal member to the lower surface of which the upper surface of said insulating base is rigidly but removably secured, said metal member having an opening formed therein and alined with said recess to accommodate the bulb of an electric lamp, and a hollow lens formed of substantially unbreakable translucent material of a desired color removably secured to said metal member, said lens being `wall of said recess having an opening formed therein, said opening providing clearance for the center and screw shell contacts of a lamp, a flat, punched sheet metal center socket contact member secured to said base and underlying the bottom wall of said recess and having a free end portion thereof alined with said opening, a second punched sheet metal contact member positioned within said recess in upwardly oifset'relation to the bottom wall of the latter, said Isec ond contact'member having a portion thereof alined with said opening and formed to accommodate the screw shell contact of a lamp, a pair of terminal members secured to the bottom wall of said recess and having portions thereof projectinglaterally beyond the side walls of said recess to facilitate top or bottom wiring of the device, each' of said members elecing, said enlarged upper end of the b ingan internal thread of a diameter correspondc ing to that of said metalmember, and a molded assenso 5 trically connected ,with oneof said contact .meinbers, a 'die-cast metal member to the lower end' l'of which said insulating base is removably .se-

cured, said metal member having a threaded opening formed therein, a hollow'metal bushing having a reduced and threaded lower end portion adapted for cooperative 4engagement with said threaded-opening, a panel adapted to overlie said-metalmember and having an opening to provide clearance for the lowerend of saidv bushing. the relatively largeupper end of said bushing having an annular'shoulder overlying said panel to provide for one-hole mounting of said pilot light vdevice as a unit with respect thereto upon a given adjustment of d bushhollow dome-shapedl lens of highly translucent substantiallyunbreakable material having an exteriorly threaded lowerend portion for,coopera tive .engagement with the internal thread on said bushins.- 4. In a pilot light device, in combination, a one-piece -molded insulating base having a recess l opening tothe upper surface thereof, the bottom V'-wall of said lrecess having an opening formed therein, said opening providing clearancefor the within said recess in upwardly offset relation.

to the bottom wall of the latter, ssLid second contact member having a portion thereof alined `with said opening and formed to accommodate the screw shell contact of a lamp, a pair of terminal members secured to the `bottom wall of said recess, and having portions thereof projecting laterally beyond the side walls of saidre-v cess to facilitate top or bottom wiring ofthe de-` vice,each of said terminal members being electrically connected with one of said contact members, a die-cast metal member to the lower vend of which said insulating base. is removably sev cured, said metal memberihaving a threaded opening formed therein, a hollow metal. bushing having a reduced and threaded lowerend portion adapted for cooperative Aengagement with said threaded opening, a panel adaptedto overlie said metal member and having an. opening to provide clearance for the lower end of said vbushing, the relatively large upper end of said busliing having an annular shoulder overlying said panel to provide for one-hole mounting of said pilot light device as a unit with respect thereto upon a given adjustment of said bushing, said enlarged upper end of the bushing having an in-v ternal -thread of a diameter corresponding to that v v of said metal member, a molded hollow domeshaped lens of highly translucent substantially unbreakable materialv havingk an exteriorly `threaded lower endportion for cooperative engagement with the internal thread on said' bushing, said engagement between said lens and said bushing being substantially liquid-tight, and a f gasket of synthetic rubber-likevmaterial interposed between the upper end of said metal member and said panel to render the connection therebetween substantiallyliquld-"tight,

5. Ina pilot light device, in combination, .a one-piece molded insulating base having afrelahavtively large substantially rectangular recess opening tothe upper. surface thereof, the bottom wall of said recess having a relatively smaller substantially circular opening formed therein, said 5 opening providing. downward .clearance for the center and screw shell contacts of a lamp, a fiat, punched sheet metal center socket contact member secured to. said baseand underlying the bottomwa-ll or said recess and having a free end portion thereof `alinedwith said opening, a second punched sheet metal contact member linsertable downwardly into and positioned within said recess in upwardly offset relation to thebottom wall of the latter, said second contact member having'a portion thereof .alined with said opening and formed to accommodate the screw shell contact of a lamp, a pair'of terminal members secured to and also'underlylng the bottom wall of said recess andl having portions thereof project- .20 ing a substantially distance laterally beyond and at vright angles to the respective side walls of said recess to facilitate top wiring of the device, each of said terminal members being electrically con-l nected with one. of said contact members.. said ggvvbase having a pair of integral lateralprojections 'extending downwardly a substantial distance be- I' vlow thebottom wall of saidrecess, a die-cast metal member overlyinig theupper surface of saidinsulating'base, said metal memberand said V projectii'insfhaving alined passages formed therein. anda pair of headed bolts the threadedshanks V of which extend downwardly through said'alined passages,- said shanks being adapted to take into tapped openings in a suitable panel, to thereby so provide forbase 'mounting of said pilot light device.

6.In a pilot light device, `in combination, a one-piece molded insulating-base having a recess opening to the upper surface thereof, the bottom 40 wall of said recess having an opening formed therein, said opening4 providing clearance for the center' and screw shell contacts of a lamp, a iat,

v punched sheet metal center socket contact meml bersecured to said base and underlying the bottom wall of said recess and having a free end portion thereof 4alined with said opening, a second punched sheet metal contact member positioned within said recess in upwardly onset relation to the bottom wall of the latter, said second contact '50 member haw/ ing a portion thereof alined with said opening and formed to accommodate the screw shell contact of a lamp, a pair of'terminal members secured to the bottom wall of said recess and lhaving portions thereof projecting laterally 56 beyond vtheside walls of said recess to facilitate top wiring of the device, each of said terminal members being electrically connected with one of said contact-members, said base having a pair of intergral lateral projections extending like disoo tances above and below the side walls of said recess, y a metal member overlying said insulating base, said metal member and said projections having Valined passages formed therein, a. pair of vheaded bolts the Shanks of which are positioned os within .said passages, and means adapted for cooperative engagement by .the threaded shanks of said bolts, whereby said base and said metal member are retained in assembledrelation.'

' 7. In a pilot light device, in combination, a

one-piece molded insulating base having a recess opening tothe 'upperfsurface thereof, the bottom -wall .of said recess having an opening formed i therein, said opening providing clearance for the center and screw shell contacts of a lamp, a fiat,

. ,#5 punches sheet mem center met Contact.

ber secured lto said base and underlying the bottom wall of said recess and having a free end portion thereof alined with said opening, a second assenso formed therein to provide clearance for the cenpunched sheet metal contact member positioned within said recess in upwardly on'set relation to the bottom wall of the latter, said second contact member having a portion thereof alined with said opening and formed to accommodate the screw shell contactof a lamp, a pair of terminal members s'ecured to the bottom wall of said recess and having portions thereof projecting laterally -beyond the side walls of said recess to facilitate top wiring ofthe device, each of said terminal members being electrically connected with one of said contact members, said base having a pair of integral lateral projections extending like distances above and below the side walls of said recess, a metal member overlying said insulating base, said metal member and said projections having alined passages formed therein, a pair of headed bolts the shanks of which are positioned within said passages, the passages in said metal member being tapped, the threaded shanks of said bolts being adapted to cooperatively engage said tapped passages to retain said base and said metal member in assembled relation, said metal member having a relatively large centrally located threaded opening formed therein, and a shouldered hollow metal bushing having an externally threaded lower end engageable with said threaded opening to provide for one-hole mounting of said device to a perforated panel or the like. Y

8. In a pilot light device. in combination, a molded insulating base having a relatively large substantially rectangular recess opening to the upper surface thereof, the bottom wall of said recess having a substantially circular recess formed therein to provide downward clearance for the center and screw shell contacts of a lamp, the bottom wall of said rst mentioned recess having a pair of integral ledges formed thereon at diagonally opposite corners thereof, a punched and stamped sheet metal socket contact member having one end thereof seated upon one of said ledges and removably attached thereto, said member having a substantially circular opening formed therein adjacent to the other end thereof,

said member having a slot formed therein and l extending from said last mentioned end to said opening to provide a pair of arms, said arms being'respectively bentin opposite directions from the initial planethereof to deform the peripheral edge of said opening into the form of a spiral .to accommodate the screw-shell contact of an electric lamp, a center socket contact comprising a flat, punched sheet metal member underlying the bottom wall of said first mentioned recess and removably secured thereto, the free end portion of said last mentioned contact being alined with said opening for cooperation with the center contact of a lamp, and a pair of wiring terminal members also underlying the bottom wall of said recess and projecting a substantial distance laterally therebeyond in a plane parallel thereto to facilitate attachment of circuit wires, each of said wiring terminal members being electrically connected with one of said socket contacts.

9. In a pilot light device, in combination, a molded insulating base having a substantially rectangular recess opening tothe upper surface thereof, the bottom wall of said recess having a relatively large substantially circular opening ter and screw shell contacts of a lamp, the bottom wall of said recess having a pair of integral ledges formed thereon at diagonally opposite 'corners thereof, a punched and stamped sheet metal socket contact member having one end thereof seated upon one of said ledges and removably attached thereto, said member having a substantially circular opening formed therein adjacent to the other end thereof, said member having a slot formed therein and extending from said last mentioned end to said opening to provide a pair of arms, said arms being respectively bent in cpposite directions from the initial plane thereof to deform the peripheral edge of said opening into the form of a spiral to accommodate the screw-shell contact of an electric lamp, a center socket contact comprising a fiat, punched sheet metal member underlying the bottom wall of said recess and removably secured thereto, the free endportion of said last mentioned contact being alined with said opening for cooperation with the center contact of a lamp, a pair of wiring terminal members also underlying the bottom Wall of said recess and projecting laterally therebeyond to facilitate attachment of circuit wires,

l each of said wiring terminal members being electrically connected with one of said socket contacts, a die-cast metal member superimposed upon said base and removably attached to the latter, said die-cast member having an opening formed therein to accommodate a lamp bulb, and means including an externally and internally threaded hollow metal bushing associated with said die-cast member and adapted to provide for one-hole mounting thereof to a suitable support.

`10. In a pilot light device, in combination, a one-piece molded insulating base having a relatively large recess opening to the upper surface thereof, the bottom wall of said recess having an opening formed therein. said opening providing downward clearance for the center and screw shell contacts of a lamp, a fiat, punched sheet metal center socket contact member secured to said base and underlying the bottom wall of said recess and having a free end portion thereof alined with said opening, a second punched sheet metal contact member insertable downwardly offset relation to the bottom wall of the latter.

said second contact member having a portion thereof aimed with said opening and formed to accommodate the screw shell contact of a lamp, a pair of terminal members secured t0 and underlying the bottom wall of said recess and having portions thereof projecting laterally a substantial distance beyond and at right angles to the respectivel side walls of said recess to facilitate wiring of the device, each of said terminal members being electrically connected with one of said contact members, and means associated with said base to alternatively provide for base mounting or-one-hole mounting of the device as a unit to a suitable support, said means comprising a perforated die-cast metal member superimposed upon said base, a pair of perforated legs formed integrally with said base and projecting downi and said legs.

CLYDE F. ROBBINS. 

